IPv6信息家电控制界面的自动生成技术

针对基于IPv6的UPnP家庭网络，结合IPv6家庭网关在外部网络与IPv6家庭网络交互中的重要作用，设计并实现了IPv6信息家电控制界面的自动生成方案和相应的集中控制机制，应用于外网用户对基于IPv6的UPnP家庭网络中信息家电的远程控制。IPv6家庭网关根据模板文件，为基于IPv6的UPnP家庭网络中的每台信息家电自动生成统一风格的控制界面；IPv6家庭网关接收到外网用户通过控制界面提交的控制命令后，根据SOAP协议集中控制信息家电。该文的研究完善了UPnP家庭网关标准(Internet Gateway Device V1.0)。     

家庭网络中嵌入式服务器的研究

针对家庭网络智能互联技术以及基于嵌入式系统的网络技术,提出了一种家庭网络中嵌入式服务器的软硬件系统的设计方案.采用ARM UClinux来构建软硬件开发平台,并提出一种基于嵌入式系统的家庭网络互联协议通用家庭网络互联协议(UHNIP),实现家庭网络设备的智能互联,资源共享和协同服务.通过实现动态Web服务器使家庭网络接入Internet,实现家庭网络远程监控.     

基于OSGI家庭网关的多媒体系统设计

随着家庭网络技术和多媒体技术的飞速发展,如何实现数字家庭中多媒体服务智能化和人性化已成为当今研究的热点。本文介绍一种基于OSGI家庭网关和UPNP AV架构扩展的媒体共享系统设计,实现家庭网络中多媒体设备的互操作,并且可以通过家庭网关上的虚拟服务器访问外部多媒体设备,同时为多媒体内容提供者提供一个强大的工具,使为用户提供多媒体服务更加智能化。多媒体提供者无需增加额外的设备和配置,不需要准备另外一个协议,使用原来的媒体传输协议就可以连接UPNP AV框架。本系统的服务器框架提供远程I/O服务让用户可以通过手持设备远程控制和访问系统中的多媒体资源。     

SEP6200平台上Linux内核的USB OTG驱动设计

为了满足两个USB设备之间直接进行数据通信的需求,通过对现有USB OTG协议和相关应用的研究,在国产SoC芯片SEP6200平台上设计并实现了基于Linux内核的USB OTG模块驱动。首先介绍了OTG标准中的对话请求协议(SRP)和主机交换协议(HNP),然后制定并设计了基于USB控制芯片USB3343的硬件模块方案,最后根据Linux内核中已有的USB驱动架构完成了USB OTG设备驱动的设计,并最终实现了SEP6200嵌入式平台USB Host和De-vice角色的自由转换功能。     

USB接口的数字摄像系统设计

讨论了基于USB(UniversalSerialBus)接口的数字摄像系统的实现。该系统使用CY-PRESS公司的EZ_USB系列芯片,并利用其开发板来实现数字摄像系统。该系统完全符合USB1.1协议,是一个新型的多媒体设备。     

基于ARM-Linux的家用网络平台设计与实现

以家庭信息化网络的现状与需求为出发点,对基于ARM-Linux的家庭网络信息系统进行深入研究,提出了基于无线ZigBee技术的家庭网络体系的设计方案;通过构建该平台的模型和分析嵌入式终端的体系结构,阐述了在Linux和ARM S3C2410X处理器为核心的终端软硬件系统上,通过扩展无线通信模块,实现家居信息智能化管理;在所构建的家庭网络硬件平台上,应用HTTP协议,成功实现了远程用户对家庭网络的控制与访问.     

机顶盒家庭媒体共享系统研究与实现

数字家庭是近年来家庭电子消费领域逐渐升温的一个新概念,其定义是由家庭中的电子产品组成的互连、互操作的网络系统。基于此实现的多媒体和娱乐资源在家庭范围内的共享,成为近期技术发展的热点。机顶盒作为家庭媒体娱乐中心,除了实现传统电视直播、点播、Web浏览等业务,与家庭内其他电子设备实现媒体娱乐资源的共享成为必备的功能特性。为深入掌握家庭媒体共享技术并指导产品开发,本文对其系统构成、协议体系和工作原理等进行研究分析,并在此基础上,针对性提出了机顶盒作为媒体服务设备和媒体播放设备的基本架构和组成单元,并且对各单元功能进行详细描述,介绍了相关SDK的应用方法和流程,为机顶盒和其他家庭多媒体终端实现媒体共享功能提供了理论依据和实现参考。     

USB设备控制器的硬件实现与研究

在研究通用串行总线(USB)协议的基础上，建立了数据采样的数学模型，并基于该数学模型提出了数字锁相环的一种简单可靠的实现方法。在给定的USB主机和设备周期差异范围内，该USB设备能够正确传输。在保证带宽利用率的基础上，设计了缓冲区的实现方案，并将该USB设备控制器应用在基于龙芯的SoC芯片上，用FPGA进行了验证。     

基于蓝牙技术的家庭网络系统的设计和实现

在以前的项目中 ,实现了一个具有家庭网关等功能的家庭网络平台 ( HNP) .为了使用户随时随地的使用家庭中的服务 ,围绕着 HNP设计了一个解决方案 -使用蓝牙技术搭建无线家庭网络系统 .SIG规范中的蓝牙服务发现协议是针对运动环境的 ,对服务调用的实现也未做出规定 .针对家庭网络的特点 ,在本解决方案中扩充了蓝牙服务发现协议 ,使其具有服务注册、服务声明等功能 ,并尝试了一种新的服务调用机制 :以 XML为核心 ,SOAP和蓝牙 SDP模块共用的方式来实现服务调用     

蓝牙技术在智能家庭网络系统设计中的运用

本文简要概述了智能家庭网络以及蓝牙技术在家庭组网技术中的优势,构建了基于蓝牙技术的智能家庭网络,介绍了蓝牙模块和内部协议构架,设计了蓝牙模块的通信接口电路。     

基于流媒体技术的家用数字图像监控系统

本文提出了一种经济实用的基于流媒体技术的家用数字图像监控报警系统的实现方案，该系统以廉价的USB摄像头为图像采集设备，利用作为家庭信息平台中枢的PC机强大的处理能力，采用Windows Media技术对图像进行实时压缩编码和流化，当异常发生时，以流媒体形式对报警图像进行存储和传输，使得用户能远程监控家中的各种警报情况。     

A URI-based approach for addressing fragments of media resources on the Web

To make media resources a prime citizen on the Web, we have to go beyond simply replicating digital media files. The Web is based on hyperlinks between Web resources, and that includes hyperlinking out of resources (e.g., from a word or an image within a Web page) as well as hyperlinking into resources (e.g., fragment URIs into Web pages). To turn video and audio into hypervideo and hyperaudio, we need to enable hyperlinking into and out of them. The W3C Media Fragments Working Group is taking on the challenge to further embrace W3C??s mission to lead the World Wide Web to its full potential by developing a Media Fragment protocol and guidelines that ensure the long-term growth of the Web. The major contribution of this paper is the introduction of Media Fragments as a media-format independent, standard means of addressing media resources using URIs. Moreover, we explain how the HTTP protocol can be used and extended to serve Media Fragments and what the impact is for current Web-enabled media formats.     

Shaping an entertaining future at Carnegie Mellon

Carnegie Mellon established the Entertainment Technology Center. The ETC uses interdisciplinary cooperation to advance the boundaries of digital technology. The ETC strives to prepare students for careers involving digital media in the entertainment industry. The idea is to prepare students for real-world time constraints and deadlines. The ETC's interactive animatronics initiative seeks to create conversationally interactive, emotionally compelling animatronic figures. The ETC's project-oriented approach to teaching innovation has been well received by entertainment companies.     

ISDN中2B+D转USB网络接口设备的实现

ISDN终端产品能独立实现数字电话、传真、图文、视频等多种功能。如果将PC机虚拟成ISDN终端,就可以利用PC机丰富的软硬件资源融合ISDN终端产品的各种功能。文章分析了电信网中的ISDN2B--DU数字用户接口单元和USB协议框架,提出了一种实用的ISDN2B--DU接口转USB网络接口的实现方案,实现了NT1产品和USB主机通信,从而大大扩展了ISDN的服务领域。     

无线Ad Hoc环境下基于跨层设计和多包接收的媒体接入控制算法

利用多包接收的方法和跨层设计的思想,提出一种基于IEEE802．11接入控制策略中的RTS／CTS机制,来实现无线Ad Hoc网络媒体接入的算法,并对新算法进行了理论分析和仿真。分析结果表明与传统的RTS／CTS机制相比,该算法有效地提高了无线Ad Hoc网络的吞吐量。     

A multi-threshold online smoothing technique for variable rate multimedia streams

Variable bit rate (VBR) compression for media streams allocates more bits to complex scenes and fewer bits to simple scenes. This results in a higher and more uniform visual and aural quality. The disadvantage of the VBR technique is that it results in bursty network traffic and uneven resource utilization when streaming media. In this study we propose an online media transmission smoothing technique that requires no a priori knowledge of the actual bit rate. It utilizes multi-level buffer thresholds at the client side that trigger feedback information sent to the server. This technique can be applied to both live captured streams and stored streams without requiring any server side pre-processing. We have implemented this scheme in our continuous media server and verified its operation across real world LAN and WAN connections. The results show smoother transmission schedules than any other previously proposed online technique. This research has been funded in part by NSF grants EEC-9529152 (IMSC ERC), and IIS-0082826, DARPA and USAF under agreement nr. F30602-99-1-0524, and unrestricted cash/equipment gifts from NCR, IBM, Intel and SUN. Roger Zimmermann is currently a Research Assistant Professor with the Computer Science Department and a Research Area Director with the Integrated Media Systems Center (IMSC) at the University of Southern California. His research activities focus on streaming media architectures, peer-to-peer systems, immersive environments, and multimodal databases. He has made significant contributions in the areas of interactive and high quality video streaming, collaborative large-scale group communications, and mobile location-based services. Dr. Zimmermann has co-authored a book, a patent and more than seventy conference publications, journal articles and book chapters in the areas of multimedia and databases. He was the co-chair of the ACM NRBC 2004 workshop, the Open Source Software Competition of the ACM Multimedia 2004 conference, the short paper program systems track of ACM Multimedia 2005 and will be the proceedings chair of ACM Multimedia 2006. He is on the editorial board of SIGMOD DiSC, the ACM Computers in Entertainment magazine and the International Journal of Multimedia Tools and Applications. He has served on many conference program committees such as ACM Multimedia, SPIE MMCN and IEEE ICME. Cyrus Shahabi is currently an Associate Professor and the Director of the Information Laboratory (InfoLAB) at the Computer Science Department and also a Research Area Director at the NSF's Integrated Media Systems Center (IMSC) at the University of Southern California. He received his M.S. and Ph.D. degrees in Computer Science from the University of Southern California in May 1993 and August 1996, respectively. His B.S. degree is in Computer Engineering from Sharif University of Technology, Iran. He has two books and more than hundred articles, book chapters, and conference papers in the areas of databases and multimedia. Dr. Shahabi's current research interests include Peer-to-Peer Systems, Streaming Architectures, Geospatial Data Integration and Multidimensional Data Analysis. He is currently an associate editor of the IEEE Transactions on Parallel and Distributed Systems (TPDS) and on the editorial board of ACM Computers in Entertainment magazine. He is also the program committee chair of ICDE NetDB 2005 and ACM GIS 2005. He serves on many conference program committees such as IEEE ICDE 2006, ACM CIKM 2005, SSTD 2005 and ACM SIGMOD 2004. Dr. Shahabi is the recipient of the 2002 National Science Foundation CAREER Award and 2003 Presidential Early Career Awards for Scientists and Engineers (PECASE). In 2001, he also received an award from the Okawa Foundations. Kun Fu is currently a Ph.D candidate in computer science from the University of Southern California. He did research at the Data Communication Technology Research Institute and National Data Communication Engineering Center in China prior to coming to the United States and is currently working on large scale data stream recording architectures at the NSF's Integrated Media System Center (IMSC) and Data Management Research Laboratory (DMRL) at the Computer Science Department at USC. He received an MS in engineering science from the University of Toledo. He is a member of the IEEE. His research interests are in the area of scalable streaming architectures, distributed real-time systems, and multimedia computing and networking. Mehrdad Jahangiri was born in Tehran, Iran. He received the B.S. degree in Civil Engineering from University of Tehran at Tehran, in 1999. He is currently working towards the Ph.D. degree in Computer Science at the University of Southern California. He is currently a research assistant working on multidimensional data analysis at Integrated Media Systems Center (IMSC)—Information Laboratory (InfoLAB) at the Computer Science Department of the University of Southern California.     

P2P网络多媒体实时共享系统

提出一个基于三层模型的点对点(P2P)网络多媒体实时共享系统。P2P网络层基于JXTA协议实现对等点对资源的搜索和发布。服务层实现请求信息的解析并根据解析出的信息查找请求的媒体资源。媒体应用层基于JMF实现视频音频流的传输和播放,并创建副本资源向P2P网络发布资源通告。系统采用沿节点缓存,加快资源的搜索,同时提出对等点服务评估参数的概念,以此来动态的选择最优点作为服务提供者,避免P2P网络中热点的出现,平衡网络负载。     

基于USB HID规范的网络电话的研究

种类繁多的设备使用同一个U SB接口实现不同的功能,用其与H ID规范结合,实现与主机的通信,重点阐述了基于U SB H ID规范的网络电话和程序设计方法与实现技术。该技术的关键是主机与设备的通信,因而添加、查找、读写U SB与检查设备状态等模块即是该网络电话程序的核心模块,预计网络电话将成为第三代电话。